JPH08333066A - Rope rupture detecting device for elevator - Google Patents

Abstract

PURPOSE: To prevent the breakage of other apparatuses by providing a rupture detecting means constituted of an action rod moved from the initial position by a strand when the rupture of a rope occurs, a holding means holding the action rod at the initial position, and an action signal generating means generating the action signal concurrently with the action rod. CONSTITUTION: When a strand rupture occurs at part of a rope 3, the ruptured stand is released and diffused from the outer periphery of the rope 3, and it is brought into contact with an action rod 8a when it passes through the upper section of a sheave 2a. The action rod 8a is rotated in the moving direction of the rope 3 from the position where it is held by a spring 10a and a roller 10b. The engagement between the recess of the action rod 8a and the roller 10b is released, the roller 10b is protruded from the coupling position, and the operation signal is set off. When the operation signal is fed to a control panel 6A, the stand rupture of the rope 3 is detected. An operation regulating means in the control panel 6A regulates the operation of an elevator. Other apparatuses are not broken even when the rope 3 is traveled while being ruptured.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elevator rope breakage detecting device for automatically detecting a breakage of an elevator hoisting rope to restrict operation.

[0002]

2. Description of the Related Art FIG. 11 is a side view showing a schematic structure of a conventional elevator apparatus, FIG. 12 is an enlarged perspective view showing a hoist installed in a machine room in FIG. 11, and FIG.
It is a side view which expands and shows the rope for hoisting inside. In FIG. 11, 1 is a machine room for driving and driving an elevator, which is installed on the roof of a building.

Reference numeral 2 is a hoist installed in the machine room 1,
Reference numeral 2a is a sheave that is rotationally driven by the hoist 2.
Further, in FIG. 12, 2b is a cover of the inspection port of the hoisting machine 2, 2c is a support portion for pivotally mounting the rotation center of the sheave 2a, and 2d.
Are a plurality of sheave grooves provided in parallel along the outer periphery of the sheave 2a.

Reference numeral 3 denotes a plurality of hoisting ropes (hereinafter, simply referred to as ropes) hung in parallel with each sheave groove 2d. As shown in FIG. 13, each rope 3 has a plurality of wire wires joined together. It has been configured. Reference numeral 4 is an elevator car connected to one end of the hoisting rope 3, and 5 is a hanging weight connected to the other end of the hoisting rope 3.

Reference numeral 6 is a control panel installed in the machine room 1 and includes a microcomputer for driving and controlling the hoist 2. Reference numeral 7 is a hoistway for the elevator car 4, and S is a maintenance worker who performs inspection work on the elevator car 4 as necessary.

Next, the rope breakage detecting operation of the conventional elevator will be described with reference to FIGS. The elevator car 4 is moved up and down in the hoistway 7 by rotating or driving the sheave 2a of the hoisting machine 2 according to a command from the control panel 6 in the machine room 1.

At this time, since the rope 3 having the elevator car 4 and the hanging weight 5 at both ends is hung in the sheave groove 2d of the sheave 2a as shown in FIG. 12, the rope 3 and the sheave groove 2d are The frictional force causes the rotation and stop motion of the sheave 2a to be transferred to the move and stop motion of the rope 3 to drive the elevator car 4 and the suspension weight 5 up and down.

However, while the elevator car 4 and the suspension weight 5 are repeatedly operated and stopped as described above, the rope 3 is worn over time due to friction with the sheave groove 2d, so that safety is maintained. Therefore, it is necessary to monitor the wear state.

Therefore, the maintenance worker S regularly rides on the elevator car 4 as shown in FIG. 11 and moves in the hoistway 7 while operating the elevator car 4, whereby the rope 3 is in a worn state. Is visually inspected. If the rope 3 becomes worn,
The maintenance worker S determines whether the rope 3
It is determined whether or not the rope 3 needs to be replaced, and the rope 3 is replaced before the strand breaks or the like.

As described above, the maintenance worker S regularly makes an effort to prevent an accident by inspecting the condition of the hoisting rope 3, but when a sudden strand break of the rope 3 occurs. Has no device to detect this. Therefore, when the rope 3 breaks, the elevator car 4 runs while the strands are still generated, and the strands collide with or wind around other equipment to damage the other equipment, or the elevator car 4 stops due to the operation stop of the elevator. There is a risk of causing passengers to be trapped inside.

[0011]

As described above, since the conventional elevator system does not have the breakage detecting device for the rope 3, the rope 3 must be managed and maintained in safety.
It depends only on the periodic inspection by the maintenance worker S. Therefore, although it is possible to prevent the strand breakage of the rope 3 due to wear over time, the elevator car 4 is operating normally until the next inspection time, so that if a sudden strand breakage occurs. Cannot detect this and the strand breakage of the rope 3 progresses, which may cause a failure due to damage to other equipment or a passenger confinement failure due to an emergency stop of the elevator car 4. There was a problem.

The present invention has been made in order to solve the above problems, and automatically detects that the elevator hoisting rope has broken, and regulates the operation of the elevator to break the rope. An object of the present invention is to obtain a rope breakage detection device for an elevator, which prevents damage to other devices and a passenger's trap failure due to running while driving.

[0013]

According to a first aspect of the present invention, there is provided an elevator rope breakage detecting device which is close to a hoist that drives a rope in order to detect breaking of a rope having an elevator car connected to one end thereof. The breakage detection means is provided, and the operation restriction means for restricting the operation of the elevator car in response to the operation signal from the breakage detection means is provided, and the breakage detection means projects from the outer peripheral surface of the rope when the breakage of the rope occurs. It includes an operating rod moved from the initial position by the strand, a positioning holding means for holding the operating rod at the initial position, and an operation signal generating means for generating an operating signal in cooperation with the tip end portion of the operating rod.

According to a second aspect of the present invention, there is provided an elevator rope breakage detecting device according to the first aspect, wherein the positioning and holding means is a recess provided at the tip of the operating rod.
The operation signal generating means includes a roller positioned so as to be in pressure contact with the concave portion and a spring for urging the roller in a pressure contact direction with respect to the concave portion, and the operation signal generating means includes a microswitch that responds to the movement of the roller.

According to a third aspect of the present invention, there is provided an elevator rope breakage detecting device according to the first aspect, wherein the positioning and holding means includes a pair of support rods arranged close to both side surfaces of the operating rod, and the support rod. The operation signal generating means includes non-contact means, and a spring that holds each end elastically in the swinging direction.

According to a fourth aspect of the present invention, there is provided an elevator rope breakage detecting device according to the third aspect, wherein the operation signal generating means is a magnet provided at the tip of the operation rod.
A magnetism detection switch positioned so as to face the magnet in the initial position.

According to a fifth aspect of the present invention, there is provided the elevator rope breakage detecting device according to the third aspect, wherein the operation signal generating means is located at an initial position together with the light emitting means provided at the tip of the operating rod. It includes a light receiving means positioned so as to face the light projecting means, and a light projecting control means for driving and controlling the light projecting means.

Further, the elevator rope breaking detection device according to claim 6 of the present invention is the elevator rope breaking detection device according to any one of claims 1 to 5, wherein the operating rod is 2 cm to 3 cm from the surface of the rope on the hoist. They are arranged close to each other with a gap.

[0019]

According to the first aspect of the present invention, the hoist of the elevator device is provided with the operating rod which is in non-contact state and responds to the strand, and the operation of the operating rod is converted into an electrical operating signal. Automatically regulates rope breaks and regulates elevator car operation.

Further, according to a second aspect of the present invention, a roller interlocking with the microswitch is pressed against a recess provided at the tip of the operating rod to hold the operating rod in an initial position in a movable state. In addition, the operation signal of the microswitch is switched with an inexpensive structure by the mechanical contact that responds to the movement of the roller when the operation rod is operated.

Further, according to a third aspect of the present invention, a pair of support rods which are erected via springs are arranged close to both side surfaces of the operating rod, and the operating rod is movable in an initial position. By holding the non-contact means, the non-contact means can be applied as the operation signal generating means.

According to the fourth aspect of the present invention, the magnetic detection switch is arranged so as to face the magnet provided at the tip of the operating rod in a non-contact manner, and the operating signal of the magnetic detection switch is transmitted when the operating rod is activated. Switch.

According to a fifth aspect of the present invention, the light receiving means is arranged so as to face the light projecting means provided at the tip of the operating rod in a non-contact manner, and the operating signal of the light receiving means is activated when the operating rod is activated. Switch.

Further, according to the sixth aspect of the present invention, the operating rod is disposed close to the surface of the hoisting rope with a gap of 2 cm to 3 cm from the surface of the hoisting rope, and the strand can be detected reliably and without malfunction.

[0025]

【Example】

Example 1. Embodiment 1 of the present invention will be described below with reference to the drawings. 1 to 3 are a perspective view, a side view, and a plan view, respectively, showing Embodiment 1 of the present invention, and FIG. 4 is an enlarged view of a main part (a contact part between a microswitch and an operating rod) in FIG. 5 is a side view showing the broken state of the rope in an enlarged manner, and FIG. 6 is a plan view showing the operating state when the rope is broken according to the first embodiment of the present invention. The overall configuration of the elevator device (not shown) is as shown in FIG.

In the drawings, 2A and 6A correspond to the hoisting machine 2 and the control panel 6, respectively, and 2a to 2d and 3 are the same as those described above. In this case, the hoist 2A has means for automatically detecting breakage of the rope 3, and the control panel 6A has means for restricting the operation of the elevator car 4 when the breakage of the rope 3 is detected.

Incidentally, in FIG. 3, a part of the rope 3 is not shown for the sake of convenience in order to make it easy to recognize the sheave groove 2d, but in reality, the rope 3 is hung in each sheave groove 2d. It is assumed that Further, in FIG. 5, 3a is a rope 3
The broken end portion of the strand 3 a is a broken strand of the wire wire that constitutes the wire, and normally, the broken end portion projects from the outer peripheral surface of the rope 3 by about 10 cm.

Reference numeral 8 denotes an operating rod mount having a U-shaped cross section which is vertically erected on the inspection port lid 2b of the winding machine 2A, and 8a has one end rotatably mounted in the recess of the operating rod mount 8. An operating rod, 8b is a rotary shaft which is vertically provided in the central recess of the operating rod mount 8 and pivotally supports one end of the operating rod 8a, and 8c is formed on the other end of the operating rod 8a opposite to the rotating shaft 8b side. It is a recessed part.

As will be described later, one end of the operating rod 8a is formed by the strand 3a generated when the rope 3 is broken, and the arrow A (FIGS. 3 and 4) is centered around the rotating shaft 8b according to the rotating direction of the sheave 2a. (See) can be rotated in the direction. The operating rod 8a is, for example, 2 cm to 3c so that the strand 3a is reliably caught and does not malfunction.
The sheave 2a is closely arranged on the sheave 2a through a space D (see FIG. 3) of about m.

Reference numeral 9 is a detector mounting plate which is erected on the supporting portion 2c of the sheave 2a. Reference numeral 10 denotes a microswitch horizontally mounted on the upper portion of the detection unit mounting plate 9, and includes a spring 10a having a biasing force in the extension direction and a spring 1
0a and a roller 10b provided at the front end portion thereof. The roller 10b presses and contacts the concave portion 8 of the operating rod 8a by the urging force of the spring 10a, and holds the tip end position of the operating rod 8a in the state shown in FIGS.

The operating rod 8a is horizontally attached at a position where it does not come into contact with the rope 3 so that it forms an angle of 90 ° with respect to the moving direction of the rope 3 hung on the sheave 2a.
In addition, the microswitch 10 includes the recess 8c of the operating rod 8a.
Has a contact point that responds to the engagement relationship between the roller 10b and the roller 10b. When both are in the engaged state, an ON operation signal is output. An off operation signal is output when 10b projects beyond the engagement position. Reference numeral 11 is an operation detection cable for transmitting an operation signal of the microswitch 10 to the control panel 6A.

Next, the operation of the first embodiment of the present invention will be described with reference to FIGS. 1 to 6 and 11. Note that the operation of the elevator device is the same as that of the above-mentioned conventional technique, and therefore its explanation is omitted. First, in a normal state, the roller 10b of the micro switch 10 acts by the spring 10a in the direction of pressing the concave portion 8c of the operating rod 8a, and holds the position of the operating rod 8a. At this time, the operation signal output from the microswitch 10 to the control panel 6A is on.

Here, if strand breakage occurs urgently in a part of the rope 3 as shown in FIG. 5, the broken strand 3a separates from the outer peripheral surface of the rope 3 and diffuses. The strand 3a thus separated from the rope 3
Comes into contact with the operating rod 8a when passing through just above the sheave 2a as the sheave 2a rotates.

Therefore, the operating rod 8a is flipped and rotated from the position held by the spring 10a and the roller 10b of the microswitch 10 in the moving direction of the rope 3 as shown in FIG. 6, for example. As a result, the recess 8c of the operating rod 8a and the roller 10b of the micro switch 10 are disengaged from each other, and the roller 10b is projected from the engaged position by the spring 10a, and the operation signal output from the micro switch 10 is turned off.

When an operation signal indicating that the micro switch 10 is turned off is transmitted to the control panel 6A in the machine room 1 through the operation detection cable 11, the control panel 6A indicates that the micro switch 10 has been turned off, that is, the strand break of the rope 3. Is detected. As a result, the control panel 6A
The operation regulation means therein regulates the operation of the elevator car 4 and takes measures such as stopping the elevator car 4 at the nearest floor and not restarting it.

Thereafter, when the maintenance worker S completes the replacement process of the rope 3, the operation rod 8a is returned from the position of FIG. 6 to the initial position of FIG. 3, and the concave portion 8c at the tip end and the roller 10b are engaged. Return to.

In this way, by automatically detecting the occurrence of an emergency break of the rope 3, and restricting the operation of the elevator car 4, the rope 3 travels while it is broken, and other equipment is damaged, or the elevator car is broken. It is possible to prevent failures such as trapping passengers in the vehicle 4. Further, the breakage of the rope 3 due to deterioration over time can be prevented by the periodic inspection by the maintenance worker S as in the above.

Example 2. In the first embodiment, the mechanical microswitch 10 is used as the operation signal generating means for detecting the occurrence of the strand break of the rope 3, but a non-contact means such as a combination of a magnetic detection switch and a magnet is used. The operational reliability may be improved. 7 and 8 are a side view and a plan view showing a second embodiment of the present invention in which a magnetic sensor is used as a breaking detecting means of the rope 3.

In each drawing, 2B is the above-mentioned winding machine 2
Corresponding to A, 2a, 2b, 3, 6A, 8, 8a,
8b, 9 and 11 are the same as described above. Also,
The configuration of the main part (not shown) is as shown in FIG. 1, and the overall configuration of the elevator device is as shown in FIG.

Reference numeral 12 is a support rod for holding the operation rod 8a in the stationary stop position, which is provided upright in proximity to the inspection port lid 2b. In addition, as shown in FIG.
A pair is provided in the vicinity of both side surfaces of the operating rod 8a. 1
Reference numeral 2a is a spring interposed at the lower end of the support rod 12, so that the support rod 12 is in a vertical posture with a relatively weak biasing force.
Holds elastically in the swinging direction.

Reference numeral 13 is a magnetic detection switch provided on the upper end of the detection portion mounting plate 9, and is the microswitch 10 described above.
Functioning as a substitute, it outputs an operation signal which is normally turned on and is turned off when the breakage of the rope 3 is detected. 14
Is a magnet attached to the tip (swing end) of the operating rod 8a, and is arranged so as to face the magnetic detection switch 13. In this case, the magnetic detection switch 13 and the magnet 14 constitute a means for detecting a strand break of the rope 3.

Next, the operation of the second embodiment of the present invention will be described with reference to FIGS. 1, 7, 8 and 11. The operation of the elevator and the breaking of the strands of the rope 3 are the same as those in the first embodiment, and a description thereof will be omitted. Similarly to the above, the strand 3 separated due to breakage
The a hits the operating rod 8a when the sheave 2a is rotated to pass directly above the sheave 2a.

The operating rod 8a moved in the moving direction of the rope 3.
Pushes over the support rod 12 supported by the urging force of only the spring 12a, gets over the support rod 12, is repelled from the initial position held by the support rod 12, and moves in the moving direction of the rope 3 as in FIG. .

As a result, the magnet 14 attached to the tip of the operating rod 8a moves away from the position facing the magnetic detection switch 13, so that the operation signal of the magnetic detection switch 13 changes from ON to OFF, and this OFF signal changes to Motion detection cable 1
1 is transmitted to the control panel 6A in the machine room 1. At this time, since the operation signal is obtained by the non-contact means, there is no deterioration with time as compared with the above-mentioned mechanical means, and the reliability of the operation signal is improved. Hereinafter, similarly to the above, the control panel 6A is
In response to the off signal of the magnetic detection switch 13, the rope 3
The occurrence of strand breakage is detected and the operation of the elevator car 4 is restricted.

Example 3. In the second embodiment, the combination of the magnetic detection switch 13 and the magnet 14 is used as the means for detecting the occurrence of strand breakage of the rope 3, but other non-contact means such as an optical sensor may be used.
9 and 10 are a side view and a plan view showing a third embodiment of the present invention in which an optical sensor is used as a breaking detecting means for the rope 3.

In each figure, 2C and 6C correspond to the above-mentioned hoisting machine 2B and control panel 6A, respectively, and 2a, 2b, 3, 8, 8a, 8b, 9, 11, 12 are shown.
And 12a are the same as described above. In addition, the configuration of the main parts not shown is as shown in FIG. 1, and the overall configuration of the elevator device is as shown in FIG.

Reference numeral 15 denotes a light receiving means provided on the upper end of the detecting portion mounting plate 9, which acts on behalf of the above-mentioned magnetic detection switch 13 and which is normally turned on and turned off when a break of the rope 3 is detected. Output a signal. A light projecting means 16 is attached to the tip of the operating rod 8a, and is arranged so as to face the light receiving means 15.

The photocoupler consisting of the light receiving means 15 and the light projecting means 16 constitutes means for detecting the strand break of the rope 3, and in the normal state, the light projecting means 16 is provided.
Emits light toward the light receiving means 15, and the light receiving means 15 receives the light from the light projecting means 16.

Reference numeral 16a is a light projecting control cable for transmitting a drive control signal from the control panel 6C to the light projecting means 16. In this case, the control panel 6C in the machine room 1 is provided with not only the operation regulating means at the time of detecting the breakage of the rope 3 but also the light emitting control means for driving and controlling the light emitting means 16.

Next, the operation of the third embodiment of the present invention will be described with reference to FIGS. 1, 9, 10, and 11. The operation of the elevator and the operating state of the operating rod 8a at the time of breaking the strand of the rope 3 are the same as those described above, and thus the description thereof is omitted.

First, when the elevator car 4 is in a normal state in which it can operate, the control panel 6C controls the light emission control cable 1
A drive control signal is output to the light projecting means 16 via 6a. Thereby, the light projecting means 16 emits light toward the light receiving means 15 in response to the drive control signal.

At this time, since the operating rod 8a is positioned and held by the support rod 12, the light receiving means 15 positioned on the optical axis of the light projecting means 16 receives the light from the light projecting means 16 and is turned on. Is output to the control panel 6C via the operation detection cable 11.

On the other hand, when the operating rod 8a is moved by the strand 3a which is detached when the rope 3 is broken, the operating rod 8a is moved.
The light projecting means 16 attached to the tip of a is separated from the position facing the light receiving means 15. Therefore, the light receiving means 1
Since 5 will be off the optical axis from the light projecting means 16, it outputs an operation signal indicating OFF, and the operation detection cable 1
1 to the control panel 6C. Hereinafter, similar to the above,
The control panel 6C detects that the light receiving means 15 has been turned off, that is, the strand break of the rope 3 has occurred, and regulates the operation of the elevator.

[0054]

As described above, according to the first aspect of the present invention, in order to detect the breakage of the rope having the elevator car connected to one end thereof, the breakage detecting means is disposed in the vicinity of the hoist driving the rope. And an operation restricting unit that restricts the operation of the elevator car in response to the operation signal from the breakage detecting unit, and the breakage detecting unit moves from the initial position by the strand protruding from the outer peripheral surface of the rope when the breakage of the rope occurs. Automatically detecting the occurrence of rope breakage, including the operating rod, positioning holding means for holding the operating rod at the initial position, and operation signal generating means for generating an operating signal in cooperation with the tip of the operating rod. As a result, the rope breakage detection device for elevators can be obtained, which prevents damage to other devices and passengers' trapping failure due to traveling in the rope breakage state. There is a result.

According to a second aspect of the present invention, in the first aspect, the positioning and holding means includes a concave portion provided at the tip of the operating rod, a roller positioned so as to be in pressure contact with the concave portion, and a roller. And a spring for urging the operating rod in the direction of pressure contact with the concave portion, and the operation signal generating means includes a microswitch that responds to the movement of the roller, holds the operating rod in a movable state at an initial position, and operates the operating rod. Since the mechanical contact that responds to the roller movement of is switched the operation signal of the micro switch,
There is an effect that a rope breakage detection device for an elevator that can be realized with a relatively inexpensive structure can be obtained.

According to a third aspect of the present invention, in the first aspect, the positioning and holding means includes a pair of support rods arranged close to both side surfaces of the operating rod, and one end of each of the support rods in the swinging direction. Since it includes a spring that holds elastically, the operating rod is held in the initial position in a movable state,
There is an effect that a rope breakage detecting device for an elevator to which a non-contact means can be applied as the operation signal generating means can be obtained.

According to a fourth aspect of the present invention, in the third aspect, the operation signal generating means is positioned so as to face the magnet provided at the tip of the operating rod and the magnet at the initial position. Since the operation signal of the magnetic detection switch is switched when the operation rod is operated, there is an effect that an elevator rope breakage detection device with improved reliability of the operation signal can be obtained.

According to a fifth aspect of the present invention, in the third aspect, the operation signal generating means faces the light projecting means provided at the tip of the operating rod and the light projecting means in the initial position. Since the light receiving means positioned in such a manner and the light projecting control means for driving and controlling the light projecting means are included and the operation signal of the light receiving means is switched when the operating rod is operated, the elevator having improved reliability of the operation signal. There is an effect that a rope breakage detection device for a vehicle can be obtained.

According to a sixth aspect of the present invention, in any one of the first to fifth aspects, the operating rod is arranged close to the surface of the rope on the hoisting machine through a gap of 2 cm to 3 cm. Therefore, there is an effect that a rope breakage detection device for an elevator can be obtained that does not malfunction and can reliably detect a strand.

[Brief description of drawings]

FIG. 1 is a perspective view showing a first embodiment of the present invention.

FIG. 2 is a side view showing the first embodiment of the present invention.

FIG. 3 is a plan view showing a first embodiment of the present invention.

FIG. 4 is an enlarged plan view showing a main part in FIG.

FIG. 5 is an enlarged side view showing a rope when a strand break occurs.

FIG. 6 is a plan view showing an operating state when a strand break occurs in Example 1 of the present invention.

FIG. 7 is a side view showing a second embodiment of the present invention.

FIG. 8 is a plan view showing a second embodiment of the present invention.

FIG. 9 is a side view showing a third embodiment of the present invention.

FIG. 10 is a plan view showing a third embodiment of the present invention.

FIG. 11 is a side view schematically showing the overall configuration of a conventional elevator device.

FIG. 12 is a perspective view showing a specific configuration of the hoisting machine in FIG. 11.

FIG. 13 is an enlarged side view showing a hoisting rope of a general elevator device.

[Explanation of symbols]

1 machine room, 2A to 2C hoist, 2a sheave, 2
b Inspection port lid, 3 ropes, 3a strands, 4 elevator cages, 6A, 6C control panel, 8 action rod mounts, 8a action rods, 8b rotary shaft, 8c recesses, 9 detector mount plates, 10 microswitches, 10a Spring, 10b roller, 11 motion detection cable, 1
2 support rods, 12a springs, 13 magnetic detection switches,
14 magnets, 15 light receiving means, 16 light emitting means, 16a
Light emission control cable, D space, S maintenance worker.

Claims (6)

[Claims] 1. A rope breakage detection device for an elevator for detecting breakage of a rope having an elevator car connected to one end thereof, the breakage detection means being disposed in the vicinity of a hoist that drives the rope, and the breakage detection means. The operation control means for controlling the operation of the elevator car in response to the operation signal from the detection means, and the breakage detection means, from the initial position by the strand protruding from the outer peripheral surface of the rope when the rope breakage occurs. A moving rod, a positioning holding unit for holding the rod at the initial position, and an operation signal generating unit for generating the operation signal in cooperation with the tip of the rod. Rope breakage detection device for elevators. 2. The positioning and holding means includes a recessed portion provided at a tip portion of the operation rod, a roller positioned so as to be in pressure contact with the recessed portion, and a spring for urging the roller in a pressure contact direction with respect to the recessed portion. The rope breaking detection device for an elevator according to claim 1, wherein the operation signal generation unit includes a micro switch that responds to the movement of the roller. 3. The positioning and holding means includes a pair of support rods arranged in close proximity to both side surfaces of the operation rod, and a spring for holding one end of each of the support rods with an elastic force in a swinging direction. The rope breaking detection device for an elevator according to claim 1, wherein the operation signal generation means is constituted by a non-contact means. 4. The operation signal generating means includes a magnet provided at a tip end portion of the operation rod, and a magnetic detection switch positioned so as to face the magnet in the initial position. The rope breakage detection device for an elevator according to claim 3. 5. The operation signal generating means includes a light emitting means provided at a tip end portion of the operation rod, a light receiving means positioned so as to face the light emitting means at the initial position, and the light emitting means. The elevator rope breakage detection device according to claim 3, further comprising: a light projection control unit that drives and controls the light unit. 6. The operation rod according to any one of claims 1 to 5, wherein the operating rod is arranged in proximity to a surface of the rope on the hoist with a gap of 2 cm to 3 cm. Rope breakage detection device for elevators.